Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh ban » thanh san, thanh van, thanh bac
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
thuc ban » thuoc ban, thuc dan, thu ban
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
ban cua » ban quan
y lang » o lang, _ lang, tay lang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (vu bach)) y lang xa hoi. hieu van nam thuc ban thanh ban cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu bach)) y lang xa hoi. hieu van nam thuc ban thanh ban cua triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu bach)) y lang xa hoi. hieu van nam thuc ban thanh ban cua triet*.